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2 Replies
Last post: August 21, 2010 2:56am UTC
April 29, 2010 5:23am UTC
Time-scaling coefficient
Hi,
In the Heat transfer equation, the time scaling coefficient accounts for different time scale (mins/hrs instead of second).
I am using a dimensionless unit system. I am using time in milliseconds. Do I need to use time scaling coefficient as 1000 (1/0.001 sec) to accommodate for milliseconds in dimensionless system?
Please share your expertize.
Thanks in advance,
Rakesh
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April 29, 2010 6:13am UTC in response to Rakesh Dhote
Re: Time-scaling coefficient
Hi
for me dimensionless means normalisation (and that is all what the scale factor is about), but you should be able to take your/Comsols formulas and check the units such to identify the correct scale factor and units, no?
Have fun Comsoling
Ivar
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August 21, 2010 2:56am UTC in response to Ivar Kjelberg
Re: Time-scaling coefficient
I am afraid dimensionless means much more than scaling! The denominator doesn't have to be constant.
A fomula is consistant in units automatically if written in a dimensionless form. Please don't treat your users like highschool kids.
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